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Allow multiple PIDs on command line #3

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Allow multiple PIDs on command line #3

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c8269e8
Allow multiple PIDs on command line
vapniks Aug 3, 2020
b0c3742
Update documentation
vapniks Aug 3, 2020
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7 changes: 5 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,11 @@ chmod +x psig

## Usage:
```
# Print signal info for a specific PID
./psig -p <PID>
# Print signal info for specific PIDs
./psig -p <PID1> <PID2> ...

# Print signal info for all processes running a particular command
./psig -p `pidof <CMD>`

# Print signal info for all PIDs
./psig -a
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34 changes: 18 additions & 16 deletions psig
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Expand Up @@ -173,30 +173,32 @@ def main(args):

# Single PID?
if args.pid and not args.thread_info:
try:
print_signal_info(args, args.pid, max_pid_length)
except IOError as e:
if e.errno == 2:
sys.exc_clear()
error("PID %s does not exist" % args.pid)
sys.exit(1)
else:
raise
for pid in args.pid:
try:
print_signal_info(args, pid, max_pid_length)
except IOError as e:
if e.errno == 2:
sys.exc_clear()
error("PID %s does not exist" % pid)
sys.exit(1)
else:
raise
else:
# All Processes, all Threads, or all Threads of a single Process
try:
if args.all_pids:
glob_pattern = '/proc/[0-9]*'
glob_patterns = ['/proc/[0-9]*']
elif args.all_threads:
glob_pattern = '/proc/[0-9]*/task/[0-9]*'
glob_patterns = ['/proc/[0-9]*/task/[0-9]*']
elif args.thread_info and args.pid:
glob_pattern = ('/proc/%d/task/[0-9]*' % args.pid)
glob_patterns = ['/proc/' + str(n) + '/task/[0-9]*' for n in args.pid]
else:
raise "Unexpected arguments specified, cannot proceed."

for proc_entry in glob.glob(glob_pattern):
pid = int(proc_entry.split('/')[-1])
print_signal_info(args, pid, max_pid_length)
for glob_pattern in glob_patterns:
for proc_entry in glob.glob(glob_pattern):
pid = int(proc_entry.split('/')[-1])
print_signal_info(args, pid, max_pid_length)
except IOError as e:
if e.errno == errno.ENOENT:
# Swallow exception for the PID dir not existing, since it's likely
Expand All @@ -208,7 +210,7 @@ def main(args):
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Print human-readable signal info for specified process. By default all signal info is printed.')
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument('-p', '--pid', type=int, help='Process ID')
group.add_argument('-p', '--pid', type=int, help='Process IDs (use `pidof <CMD>` here to get all PIDs for a particular command)', nargs='*')
group.add_argument('-a', '--all-pids', action='store_true', help='Print signal info for all Processes')
group.add_argument('-T', '--all-threads', action='store_true', help='Print signal info for all Threads')
parser.add_argument('-t', '--thread-info', action='store_true', help='Print signal info for all Threads of the specified PID')
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